Commitments and Contingencies (Litigation and Environmental - Narrative) (Details) R$ in Millions	1 Months Ended	6 Months Ended
	Sep. 30, 2010 BRL (R$)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 BRL (R$) site	Mar. 31, 2023 USD ($) site	Sep. 30, 2022 USD ($)
Alleged Anticompete Litigation
Loss Contingencies [Line Items]
Civil fines imposed	R$ 179.2	$ 35,000,000
Provision for litigation		$ 0
Maximum of loss contingency range subject to interest			R$ 179.2	$ 35,000,000
Environmental
Loss Contingencies [Line Items]
Approximate number of sites on which settlement has not been reached | site			28	28
Accrual for environmental loss contingencies				$ 68,900,000	$ 71,300,000
Accrual for environmental loss contingencies, maximum payout period		30 years
Environmental | Minimum
Loss Contingencies [Line Items]
Estimate of possible exposure from environmental loss contingencies				68,000,000
Environmental | Maximum
Loss Contingencies [Line Items]
Estimate of possible exposure from environmental loss contingencies				$ 82,000,000